Tag: M.W=300-400

Niu, Haifeng; Li, Jianbo; Wang, Xuefang; Qiang, Zhe; Ren, Jie published the article 《Au-Fe3O4 decorated polydopamine hollow nanoparticles as high performance catalysts with magnetic responsive properties》. Keywords: polydopamine nanoparticle catalyst magnetic responsive property.They researched the compound: Hydrogen tetrachloroaurate(III) trihydrate( cas:16961-25-4 ).Application of 16961-25-4. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:16961-25-4) here.

We demonstrated a simple approach for fabricating Au-Fe3O4/PDA hollow nanoparticles as high-performance catalysts for water purification The polydopamine (PDA) shell was in situ formed on the silica surface from self-polymerization, which acts as a medium support for coupling with metal ions (for Fe3O4 nanoparticle deposition) as well as a reducing agent and stabilizer for Au nanoparticle reduction and deposition. A step of simultaneous Fe3O4 nanoparticle deposition and silica core removal under alk. conditions is first introduced in this study. This process significantly simplifies previous strategies which typically require the use of poisonous agents such as hydrogen fluoride or addnl. complicated post-treatment steps. Under optimized conditions, the Au-Fe3O4/PDA hollow nanoparticles show a high saturation magnetization of 18.8 emu g-1 and an excellent catalytic performance for the rapid reduction of p-nitrophenol with the reaction kinetic constant of 0.34 min-1. This catalyst can be easily recovered using a permanent magnet and recycled eight times with a high catalytic cycle stability. The strategy presented in this work provides a facile and versatile approach towards designing complicated Au-Fe3O4/PDA hollow nanostructures, which might have great potential for many applications within biol., energy, and environmental technologies.

If you want to learn more about this compound(Hydrogen tetrachloroaurate(III) trihydrate)Application of 16961-25-4, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(16961-25-4).

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Pentaerythrityltetrabromide, is researched, Molecular C5H8Br4, CAS is 3229-00-3, about Synthesis and structure of tetrakis[(diphenylphosphino)methyl]methane and its tetranuclear gold chloride complex.Reference of Pentaerythrityltetrabromide.

Tetrakis(diphenylphosphinomethyl)methane, C(CH2PPh2)4, was prepared following modified literature methods, its structure determined by x-ray diffraction methods, and its 1H and 13C NMR and mass spectra compiled. The tetranuclear gold(I) complex C[CH2PPh2·AuCl]4 was obtained by treatment of the tetrafunctional ligand with four equivalent of (Me2S)AuCl, and its structure was also determined The changes in structure and conformation as compared to that of the free ligand provide evidence for attractive intramol. Au···Au interactions for one pair of gold(I) centers. Owing to steric congestion of the mol., the remainder pair are independent structural units not engaged in metal-metal interactions.

There is still a lot of research devoted to this compound(SMILES：BrCC(CBr)(CBr)CBr)Reference of Pentaerythrityltetrabromide, and with the development of science, more effects of this compound(3229-00-3) can be discovered.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Safety of Pentaerythrityltetrabromide. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Pentaerythrityltetrabromide, is researched, Molecular C5H8Br4, CAS is 3229-00-3, about Directed synthesis of spiropentane from tetrabromoneopentane. Author is D’yachenko, A. I.; Protasova, E. L.; Nefedov, O. M..

Reaction of C(CH2Br)4 (I) with Zn in 3-10% alcs. KOH at 80° for 30 min gave 70-80% mixture containing 90% II; 1,1-dimethylcyclopropane, CH2:CMeCH2Me and a small amount of III were also obtained. Treatment of I with Na, Li or Mg gave II or III, the ratio of which depended on the type of metal.

There is still a lot of research devoted to this compound(SMILES：BrCC(CBr)(CBr)CBr)Safety of Pentaerythrityltetrabromide, and with the development of science, more effects of this compound(3229-00-3) can be discovered.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

HPLC of Formula: 3229-00-3. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: Pentaerythrityltetrabromide, is researched, Molecular C5H8Br4, CAS is 3229-00-3, about Tetrakis(pyrazol-1-ylmethyl)methane and its hypodentate binuclear complex with silver(I) nitrate. Author is McMorran, David A.; Pfadenhauer, Stephan; Steel, Peter J..

The preparation and x-ray crystal structure of tetrakis(pyrazol-1-ylmethyl)methane (HL) are described. This new ligand reacts with Ag(I) nitrate to give Ag2L2(NO3)2, in which the ligand bridges two trigonal Ag atoms with bidentate and monodentate coordination domains. As such the ligand is hypodentate with one noncoordinated pyrazole group.

There is still a lot of research devoted to this compound(SMILES：BrCC(CBr)(CBr)CBr)HPLC of Formula: 3229-00-3, and with the development of science, more effects of this compound(3229-00-3) can be discovered.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 58656-04-5, is researched, SMILESS is F[B-](F)(F)F.[PH+](C1CCCCC1)(C2CCCCC2)C3CCCCC3, Molecular C18H34BF4PJournal, Article, Chemistry – A European Journal called Mobius aromatic [28]hexaphyrin phosphonium adducts, Author is Inoue, Mitsunori; Yoneda, Tomoki; Youfu, Katsuyuki; Aratani, Naoki; Osuka, Atsuhiro, the main research direction is crystal structure hexaphyrin phosphonium aromatic adduct palladium complex preparation; mol structure hexaphyrin phosphonium aromatic adduct palladium complex; hexaphyrin phosphonium Mobius aromatic adduct palladium complex preparation DFT.Computed Properties of C18H34BF4P.

The reaction of [26]hexaphyrin(1.1.1.1.1.1) with tricyclohexylphosphine was examined to investigate the effect of the electron-rich character of the phosphine on the photophys. and aromatic properties of the adduct. [28]Hexaphyrin phosphonium adducts formed from the reaction of [26]hexaphyrin with triphenylphosphine and tricyclohexylphosphine, resp., were confirmed to be Mobius aromatic mols. [26]Hexaphyrin PdII complex was found to undergo a regioselective nucleophilic addition reaction with triphenylphosphine and tricyclohexylphosphine to provide Mobius aromatic [28]hexaphyrin phosphonium adducts with a Huckel-to-Mobius topol. change as well as PdII migration. All adducts were characterized by elemental anal., UV-visible spectroscopy, 1H, 19F, and 31P NMR spectroscopy, mass spectrometry, and single crystal diffraction anal. Harmonic Oscillator Model of Aromaticity (HOMA) value was calculated using CC and CN bond lengths of the geometry-optimized structure based on X-ray crystallog. data.

There is still a lot of research devoted to this compound(SMILES：F[B-](F)(F)F.[PH+](C1CCCCC1)(C2CCCCC2)C3CCCCC3)Computed Properties of C18H34BF4P, and with the development of science, more effects of this compound(58656-04-5) can be discovered.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Prakash, J.; Prema, D.; Venkataprasanna, K. S.; Balagangadharan, K.; Selvamurugan, N.; Venkatasubbu, G. Devanand published the article 《Nanocomposite chitosan film containing graphene oxide/hydroxyapatite/gold for bone tissue engineering》. Keywords: chitosan graphene oxide hydroxyapatite gold nanocomposite bone tissue engineering; Alkaline phosphatase; Antibacterial activity; Biocompatibility; Chitosan; Graphene oxide; Hydroxyapatite.They researched the compound: Hydrogen tetrachloroaurate(III) trihydrate( cas:16961-25-4 ).HPLC of Formula: 16961-25-4. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:16961-25-4) here.

Recently, polymer based biomaterials are utilized in medical fields including surgical sutures, drug delivery devices, tissue supports and implants for interior bone fixation. However, polymer based implants leads to the formation of bio-films that are highly susceptible to microbial adhesion. In this study, we have fabricated Chitosan/Polyvinyl alc./Graphene oxide/Hydroxyapatite/gold films for potential orthopedic application. Graphene oxide/Hydroxyapatite/gold nanocomposite (GO/HAP/Au) was synthesized by simple hydrothermal method and GO/HAP/Au nanocomposite incorporated polymeric film was fabricated using gel casting method. The morphol., phase composition, crystalline structure and chem. state of the nanocomposite were characterized using as XRD, HR-TEM, FE-SEM and FT-IR. The bio-films were found to be biocompatible with mouse mesenchymal cells and it enhanced osteoblast differentiation as evidenced by more alk. phosphatase activity at the cellular level. Hence, these results suggested that the developed nanocomposites films are osteogenic potential for treating bone and bone-related diseases. Antibacterial anal. of the films shows high inhibition zones against Gram pos. and Gram Neg. bacteria (Escherichia coli, streptococcus mutans, Staphylococcus aureus and Pseudomonas aeruginosa). Thus, the obtained nanocomposites bio-films are highly biocompatible and it can be used for bone regeneration application.

There is still a lot of research devoted to this compound(SMILES：Cl[Au-](Cl)(Cl)Cl.[H]O[H].[H]O[H].[H]O[H].[H+])HPLC of Formula: 16961-25-4, and with the development of science, more effects of this compound(16961-25-4) can be discovered.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Computed Properties of C18H34BF4P. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Tricyclohexylphosphonium tetrafluoroborate, is researched, Molecular C18H34BF4P, CAS is 58656-04-5, about Palladium-Catalyzed Suzuki-Miyaura Cross-Coupling of N-Mesylamides by N-C Cleavage: Electronic Effect of the Mesyl Group. Author is Liu, Chengwei; Liu, Yongmei; Liu, Ruzhang; Lalancette, Roger; Szostak, Roman; Szostak, Michal.

N-mesylamides underwent chemoselective Suzuki-Miyaura cross-coupling with arylboronic acids in the presence of Pd2(dba)3, tricyclohexylphosphonium tetrafluoroborate, and Na2CO3 in 1,4-dioxane to yield aryl ketones by chemoselective N-C cleavage. Both the scope and the origin of high selectivity are discussed. A beneficial effect of the N-mesyl substituent on the bond activation in acyclic amides is presented. The structure of PhCONPhSO2Me was determined by X-ray crystallog.; its bond angles and conformation were analyzed to determine the effect of the mesyl group on its structure and resonance stabilization.

If you want to learn more about this compound(Tricyclohexylphosphonium tetrafluoroborate)Computed Properties of C18H34BF4P, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(58656-04-5).

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《The phase transition in pentaerythritol. III》. Authors are Nitta, Isamu; Wantanabe, Tokunosuke; Seki, Shuzo; Momotani, Masanobu.The article about the compound:Pentaerythrityltetrabromidecas:3229-00-3,SMILESS:BrCC(CBr)(CBr)CBr).Recommanded Product: Pentaerythrityltetrabromide. Through the article, more information about this compound (cas:3229-00-3) is conveyed.

In the light of the exptl. information obtained from the thermal measurements and the expansion coefficients on pentaerythritol, the transition mechanism from a tetragonal to a cubic lattice is discussed. Comparison of the large entropy, 22.8 e.u., for the polymorphic transition, with the entropy of fusion 12.7 e.u., and 25.3 e.u. for tetra-bromopentaerythritol and meso-erythritol, resp. (where, in the latter case, H bonding plays an important role), suggests a difference in degree of H bonding between the tetragonal and cubic forms of pentaerythritol. From the above information and the entropy of fusion of 3.2 e.u. for pentaerythritol, a value of 13.3 e.u. is obtained for this effect. Estimation of the difference in the configurational entropy between these 2 forms to be 14.47 e.u. from statistical considerations, gives close agreement with the exptl. results.

If you want to learn more about this compound(Pentaerythrityltetrabromide)Recommanded Product: Pentaerythrityltetrabromide, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(3229-00-3).

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Cyclobutanone》. Authors are Conia, Jean Marie; Leriverend, Pierre; Ripoll, Jean Louis.The article about the compound:Pentaerythrityltetrabromidecas:3229-00-3,SMILESS:BrCC(CBr)(CBr)CBr).Reference of Pentaerythrityltetrabromide. Through the article, more information about this compound (cas:3229-00-3) is conveyed.

A procedure for the economical preparation of cyclobutanone (I) from pentaerythritol (II) was worked out. A mixture of 700 g. II, 1300 g. 62% HBr, 700 g. 48% HBr and 600 g. AcOH was refluxed 15 hrs. and then distilled to give 1300 g. pentaerythritol tribromide (III), b12 170-80°, m. 90-5°. To 1400 g. III heated to 180° and stirred was slowly added 600 g. PBr3, the temperature not to exceed 200°. After 15 hrs. at 180°, the mixture was cooled and poured into 3 l. H2O to give 1400 g. pentaerythritol tetrabromide (IV), m. 155° (EtOH). Methylenecyclobutane (V) was prepared from IV in 60-85% yield by the method of Shand, et al. (CA 38, 26342). Ozone was passed (100 l./hr.) for about 7 hrs. through a mixture of 30 g. V, 15 g. pyridine, and 200 ml. CH2Cl2 cooled to -80°. The unreacted ozone was swept out by O and the cooling bath withdrawn. When the temperature of the stirred solution reached -20°, an exothermic reaction set in. By cooling again the temperature was kept below 0°, then brought up to room temperature overnight. The solution was decanted from some brown tar, 10 ml. concentrated HCl added, the mixture stirred 2 hrs. and the upper aqueous layer removed. The organic layer was dried with CaCl2 and fractionated to yield 22 g. I, b. 97-100°, n21D 1.4205; 2,4-dinitrophenylhydrazone m. 144-5°.

If you want to learn more about this compound(Pentaerythrityltetrabromide)Reference of Pentaerythrityltetrabromide, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(3229-00-3).

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Application of 16961-25-4. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Hydrogen tetrachloroaurate(III) trihydrate, is researched, Molecular AuCl4H7O3, CAS is 16961-25-4, about Synthesis of ultra-small gold nanoparticles by polyphenol extracted from Salvia officinalis and efficiency for catalytic reduction of p-nitrophenol and methylene blue. Author is Oueslati, Mohamed Habib; Ben Tahar, Lotfi; Abdel Halim Harrath.

The present research work reports an eco-friendly route for preparing gold nanoparticles (AuNPs) with high catalytic activity using polyphenol extracted from salvia officinalis. In both alk. (pH ∼ 11) and acidic media (pH ∼ 5), the polyphenol induced rapid reduction of the Au (III) salt and lead to the formation of highly monodisperse and spherical small (S) and larger (L) AuNPs, resp. The average particle size was found to be ∼ 6 nm for S and ∼ 27 nm for L AuNPs, resp. FT-IR revealed that polyphenol species are capped onto the nanoparticles surface favorizing a high aqueous colloidal stability of the AuNPs in a wide pH range. In addition, the produced AuNPs exhibited significant size-dependent degradation rate of p-nitrophenol (p-NP) and methylene blue (MB) to p-aminophenol (p-AP) and leucomethylene blue (LMB), resp.

Here is a brief introduction to this compound(16961-25-4)Application of 16961-25-4, if you want to know about other compounds related to this compound(16961-25-4), you can read my other articles.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem